EP 3099884 A4 20171018 - HYBRID DRILL BIT HAVING INCREASED SERVICE LIFE
Title (en)
HYBRID DRILL BIT HAVING INCREASED SERVICE LIFE
Title (de)
HYBRIDBOHRMEISSEL MIT ERHÖHTER LEBENSDAUER
Title (fr)
TRÉPAN HYBRIDE DE DURÉE DE VIE ACCRUE
Publication
Application
Priority
- US 201461934697 P 20140131
- US 201514611167 A 20150130
- US 2015014011 W 20150131
Abstract (en)
[origin: WO2015117047A1] A method of improving the service life of a drill bit comprises creating a weldment between load bearing portions of the drill bit where the weldment has a preselected root gap greater than about 25 mils and a preselected root face greater than about 25 mils, and where the weldment has a material property greater than the materials being joined.
IPC 8 full level
E21B 10/20 (2006.01); E21B 10/14 (2006.01)
CPC (source: EP RU)
B23K 9/282 (2013.01 - EP); B23K 33/006 (2013.01 - EP); E21B 10/14 (2013.01 - EP RU); E21B 10/20 (2013.01 - EP RU); E21B 10/62 (2013.01 - RU)
Citation (search report)
- [IY] EP 0238758 A2 19870930 - MARTIN MARIETTA CORP [US]
- [Y] US 2012111638 A1 20120510 - NGUYEN DON Q [US], et al
- [Y] US 2012205160 A1 20120816 - RICKS GREGORY L [US], et al
- [Y] US 2010012392 A1 20100121 - ZAHRADNIK ANTON F [US], et al
- [Y] US 4314132 A 19820202 - PORTER RONALD
- See also references of WO 2015117047A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2015117047 A1 20150806; CA 2937946 A1 20150806; CA 2937946 C 20190430; CN 105940178 A 20160914; CN 105940178 B 20190329; EP 3099884 A1 20161207; EP 3099884 A4 20171018; EP 3099884 B1 20200226; MX 2016009793 A 20161208; RU 2016135277 A 20180305; RU 2016135277 A3 20180702; RU 2681750 C2 20190312; SA 516371580 B1 20210712; SG 11201606085P A 20160830
DOCDB simple family (application)
US 2015014011 W 20150131; CA 2937946 A 20150131; CN 201580006419 A 20150131; EP 15743583 A 20150131; MX 2016009793 A 20150131; RU 2016135277 A 20150131; SA 516371580 A 20160731; SG 11201606085P A 20150131